Revert "test cases for the new features"

This reverts commit 66653e8f14.

tests/compile/ttypeclasses.nim

@@ -5,8 +5,6 @@ type
   T1 = expr
   T2 = expr
 
-  Numeric = int|float
-
 proc takesExpr(x, y) =
   echo x, y
 
@@ -34,22 +32,3 @@ takesFoo(f, f)
 takes2Types(1, 1, "string")
 takes2Types[string, int]("test", "test", 1)
 
-proc takesSeq(x: seq) =
-  echo "seq"
-
-takesSeq(@[1, 2, 3])
-takesSeq(@["x", "y", "z"])
-
-proc takesSeqOfFoos(x: seq[TFoo]) =
-  echo "foo seq"
-
-var sf = newSeq[TFoo[int]](3)
-
-takesSeq(sf)
-takesSeqOfFoos(sf)
-
-proc takesFooOfNumeric(x: TFoo[Numeric]) =
-  echo "foo of numeric"
-
-takesFooOfNumeric(sf[0])
-